Keyhole back vintage 1980s lace formal

Perfect condition 1980s formal dress! It has a unique keyhole back design. The dress itself is sheer to the bust and then it has a black lining underneath the groovy tatted lace. Dress stretches just a little bit and has a zipper back closure. Slit up back of skirt. Laying flat measuring across the front it is 20.5 inches at the armpits and 18.5 inches at the waist. There appears to be one hole in the lace on the front, but it is not noticeable when wearing due to the style of the lace (last pic)